使用 persistent_bottom_nav_bar 時導航器彈出 - Flutter

Question

我目前正在使用persistent_bottom_nav_bar: ^4.0.2和rflutter_alert但問題是當我調用Navigator.of(context).pop(); 我總是收到這個錯誤：

FlutterError (This widget has been unmounted, so the State no longer has a context (and should be considered defunct).
Consider canceling any active work during "dispose" or using the "mounted" getter to determine if the State is still active.)

當我使用persistent_bottom_nav_bar時會發生這種情況，我嘗試使用bottomNavigationBar這是Scaffold小部件的屬性，這真的很好，而且Navigator.of(context).pop();沒有問題 . 使用persistent_bottom_nav_bar時有沒有辦法做 Navigator pop

Answer 1

這對我有用。

 Alert(
      context: context,
      type: AlertType.error,
      title: "RFLUTTER ALERT",
      desc: "Flutter is more awesome with RFlutter Alert.",
      buttons: [
        DialogButton(
          child: Text(
            "COOL",
            style: TextStyle(color: Colors.white, fontSize: 20),
          ),
          onPressed: () => Navigator.of(context, rootNavigator: true).pop(),
          width: 120,
        )
      ],
    ).show();

Answer 2

閱讀此討論后，我找到了解決方案： https://github.com/RatelHub/rflutter_alert/issues/20#issuecomment-535330620 。 因此，不要使用Navigator.of(context).pop(); 我將其更改為Navigator.of(context, rootNavigator: true).pop()

Answer 3

嘗試使用：

    Navigator.pop(context);